# Engage Bio funding: rounds and investors

> Engage Bio has raised $3.9M across 1 round since 2022. Investors include Y Combinator, Pioneer Fund and Flybridge. Every round with its source.

Source: https://millionrounds.com/company/engage-bio (Millionrounds; every figure on the page links to its filing or article)

United States · [Seed startup](https://millionrounds.com/companies)

# Who invested in *Engage Bio*

One round we have observed, with the 4 investors named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Biotech

Y Combinator: W22

Funding summary Updated 26 Oct 2026

**$3.9M** raised across 1 round since 2022, from 1 source

- **Latest round:** Seed, $3.9M May 2022
- **Investors:** 4

See who backed them

## The rounds

- **May 2022** Seed **$3.9M** [Y Combinator](https://millionrounds.com/fund/y-combinator) [Pioneer Fund](https://millionrounds.com/fund/pioneer-fund-2) [Flybridge](https://millionrounds.com/fund/flybridge) [Unpopular Ventures](https://millionrounds.com/fund/unpopular-ventures) Also list them on their own site [VentureSouq](https://millionrounds.com/fund/venturesouq) Source recorded

## Everyone who backed them

[Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round

[Pioneer Fund](https://millionrounds.com/fund/pioneer-fund-2) Private equity **1** round

[Flybridge](https://millionrounds.com/fund/flybridge) VC firm **1** round

[Unpopular Ventures](https://millionrounds.com/fund/unpopular-ventures) VC firm **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=engage-bio).

## Also claim to have backed them

These 3 firms list Engage Bio as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.

[VentureSouq](https://millionrounds.com/fund/venturesouq) VC firm Seed, per its site

[WorldQuant Ventures LLC](https://millionrounds.com/fund/worldquant-ventures-llc) VC firm Per its own site

[SciFounders](https://millionrounds.com/fund/scifounders) VC firm Per its own site

## Quick answers about Engage Bio

### Who invested in Engage Bio?

Engage Bio's investors include Y Combinator, Pioneer Fund, Flybridge and Unpopular Ventures.

### How much has Engage Bio raised?

Engage Bio has raised $3.9M across 1 round since 2022.

### When did Engage Bio last raise?

Engage Bio's most recent round was a Seed of $3.9M in May 2022.

### What was Engage Bio's biggest round?

Its most recent round, $3.9M in May 2022, is also its largest on record.

### Who backed Engage Bio first?

Engage Bio's first round on record, in May 2022, was backed by Y Combinator, Pioneer Fund and Flybridge and 1 others.

### What stage is Engage Bio at?

Engage Bio's latest named round is a Seed, in May 2022.

### Where is Engage Bio based?

Engage Bio is based in the United States.

## Companies like Engage Bio

In the same sector, and raised in the last eighteen months.

[**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**Prolific Machines** $105M · Oct 2026](https://millionrounds.com/company/prolific-machines)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio)[**Clinical Ink** $24M · Oct 2026](https://millionrounds.com/company/clinical-ink)[**Rejuvenate Bio** $13M · Oct 2026](https://millionrounds.com/company/rejuvenate-bio)

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